If you want a computer you can fix and so on, you'll need something fairly big that you can see into, with enough room to turn a screw and pull out wires and so on, and then put things together. In other words, a big beige tower. Well, get one. Try to imagine an iPad that's easy to fix. It's about twice as big, it has screws and stuff all over. It weighs another twelve pounds. It would cost a lot more. Sadly, iFixit misses the point.
Surely I am not the only one who thinks that YOU have missed the point? I have never ever read an article by iFixit attacking tablets for not being user-repairable, only computers, and to be fair they have a point - non-user replaceable RAM in a 21" all in one is an absolute joke, especially considering the Apple Tax and that Apple doesn't offer its Mac in the highest theoretical configurations they can adopt (as often illustrated by OWC). Soldered RAM and a special SSD is also a bit much, and all this comes from the keyboard of one of those same laptops.
Not all consumers want repairability, and I imagine very few people buying a tablet especially desire it: what are they going to do - upgrade the RAM themselves? Of course not, they much prefer the additional battery capacity offered by the use of glues, allowing for a bigger battery, which is one of the reasons the iPad is popular - when Apple say 8 hours battery life with light tasks, they build a device which is actually capable of it.
However, the iFixit scores are ACCURATE in so much as the iPad 2 onwards are undeniably difficult to user-repair, and so what exactly did they miss? Most people don't care that they are difficult to repair, since they have AppleCare (or trust themselves not to break their toy), and so won't give the score much weighting when deciding which tablet is right for them. But I'll tell you what - if I wanted a laptop which I could take apart and modify to my heart's content, and for some reason I bought a Retina Macbook having seen a high repairability score on iFixit, I'd be mighty pissed off when it arrived all sealed with glue/pentalobe screws.
The Retina and Air are difficult to user-repair; so is the iPad. Fact. iFixit missed nothing. You did.